False. The more oxygen you need, the more quickly you breathe. That is whit your breathe faster when you exercise.
yes. plants breath in carbon dioxide and then breath out oxygen for other living creatures. then we breath in that oxygen and breath out more carbon dioxide for the plants. basically, we could not survive without plants.
no nitrogen makes up more then half of all the air we breath.
True. Water is slightly negative on the oxygen end and slightly positive on the hydrogen's end of the molecule. This is because oxygen is much more electronegative than hydrogen, so the electrons in the covalent bond spend more time around the oxygen.
Air only has about 20% oxygen, almost all of the rest is nitrogen. An oxygen tank has 100% oxygen and is used in some cases for breathing sicknesses. These patients don't need 100% oxygen, but just a bit more that is mixed with normal air when they breath in.
It is probably more accurate to say that you breath in air, a mixture of gases which contains about 21% oxygen and 0,04% CO2, and you breath out a mixture of gasses which contains a far greater concentration of carbon dioxide than you inhaled (about 5% of the mass of all the exhaled gas).
False, the more oxygen you need the faster you will breathe.
because your body is using more oxygen so it needs to get more oxygen
All of them. The plants turn the carbin dioxide converted by you into oxygen and then you can breath. You then, when you breath out, give out more carbin dioxide for the plants to breath, and give you more oxygen, Etc...
its false
why do yeast cells consume glucose much more slowly when oxygen is present than when oxygen is absent
yes. plants breath in carbon dioxide and then breath out oxygen for other living creatures. then we breath in that oxygen and breath out more carbon dioxide for the plants. basically, we could not survive without plants.
Gills are more efficient at obtaining oxygen, but there is much more oxygen in air to breath through the lungs.
Because when you work your muscles they need more oxygen, and to get more oxygen you need to breathe more often.
False, while you need oxygen to release the energy in muscles (to move), once there is enough oxygen, adding more does not create more energy. The energy comes form the food you eat, not the oxygen used to burn it.
When you are at rest, or sleeping, your heart beats slower. Because it is beating slower, blood travels more slowly through your body, and therefore more slowly through your lungs. As a result, you breath slower. When you do vigorous activity, your heart beats faster to supply blood to your body cells faster. This causes blood to race through your body and lungs, requiring you to breath a lot faster to keep up with the amount of blood that needs oxygen from your lungs.
False
your body needs to get rid of CO2 that has built up and it needs to get oxygen for energy a lot quicker. so you take bigger breaths which release more CO2 and bring in more oxygen.